I have re-read the entire thread and note that the info on page 37 of Volume V of the Design Record has not been included.
I note the discrepancy between the 133” wheelbase that has been quoted a number of times and the Design Record entry of 134 1/2”.
I have also included an image of “Maximum Vehicle Speeds” from CC60L-HB1, as the question of speed has come up in relation to two-speed rear axles.